<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>计算属性</title>
</head>
<body>
<div id="app">
    <!--  blur 监听元素失去焦点事件  -->
    <div>
        姓氏：<input type="text" name="familyName" id="familyName" v-on:keyup.enter="familyNameClicked" v-on:blur="familyNameClicked">
    </div>
    <div>
        名称：<input type="text" name="firstName" id="firstName" v-on:keyup.enter="firstNameClicked" v-on:blur="firstNameClicked">
    </div>

    <div>
        姓名全名：{{ familyName}} {{ firstName }}
    </div>
    <div>
        姓名全名：{{ fullName() }}
    </div>
    <div>
        姓名全名：{{ fullName() }}
    </div>
    <div>
        姓名全名：{{ getFullName }}
    </div>
    <div>
        姓名全名：{{ getFullName }}
    </div>
</div>
<script src="../../../../../js/vue.global.js"></script>
<script>
    const app = Vue.createApp({
        data(){
            return {
                firstName:null,
                familyName:null,
            }
        },
        methods:{
            familyNameClicked(){
                let family = document.getElementById("familyName")
                this.familyName = family.value
            },
            firstNameClicked(){
                let first = document.getElementById("firstName")
                this.firstName = first.value
            },

            fullName(){
                console.log("调用了 fullName 函数");
                return this.familyName + " " + this.firstName
            }
        },
        computed:{
            getFullName(){
                console.log("调用了 getFullName 函数");
                return this.familyName + " " + this.firstName
            }
        }
    })

    app.mount("#app")
</script>
</body>
</html>